When a user deletes items from the Deleted Items default folder by using the Delete, Shift+Delete, or Empty Deleted Items Folder actions, the items are moved to the Recoverable Items\Deletions folder. By default, a mailbox database is configured to retain deleted items for 14 days, and the recoverable items warning quota and recoverable items quota are set to 20 gigabytes (GB) and 30 GB respectively.

Use the EAC to configure deleted item retention for a mailbox

Navigate to Recipients > Mailboxes.

In the list view, select a mailbox, and then click Edit Edit Icon.

On the mailbox property page, click Mailbox usage, click More options, and then select one of the following

Use the default retention settings from the mailbox database Use this setting to use the deleted item retention setting that’s configured for the mailbox database.

Customize the settings for this mailbox Use this setting to configure deleted item retention settings for the mailbox.

Keep deleted items for (days) This box displays the length of time that deleted items are retained before they’re permanently deleted and can’t be recovered by the user. When the mailbox is created, this value is based on the deleted item retention settings configured for the mailbox database. By default, a mailbox database is configured to retain deleted items for 14 days. The value range for this property is from 0 through 24,855 days.

Don’t permanently delete items until the database is backed up Select this check box to prevent mailboxes and email messages from being deleted until after the mailbox database on which the mailbox is located has been backed up.

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